DATA COMMUNICATION
We all are acquainted with
some sorts of communication in our day to day life. For communication of
information and messages we use telephone and postal communication systems.
Similarly data and information from one computer system can be transmitted to
other systems across geographical areas. Thus data transmission is the movement
of information using some standard methods. These methods include electrical
signals carried along a conductor, optical signals along an optical fibers and electromagnetic
areas. To read more details about router , switch and networking click here